CGG Crew EGY3363 – FINAL REPORT – SIWA SALLUM 3D - APACHE

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FINAL REPORT

SIWA SALLUM 3D 3D HPVA Vibroseis

From June 2007 to September 2007

FOR

APACHE

By

CGG ARDISEIS Compagnie Générale de Géophysique

CREW EGY3363

CGG Crew EGY3363 – FINAL REPORT – SIWA SALLUM 3D - APACHE

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TABLE OF CONTENTS

Table of contents.................................................................................................................. 2 Table of figures..................................................................................................................... 2 PRESENTATION .................................................................................................................. 5 OPERATIONS SUMMARY .................................................................................................. 11 SAFETY ............................................................................................................................... 13 EMERGENCY RESPONSE PLAN....................................................................................... 16 HSE PROGRAMS................................................................................................................ 17 SURVEYING ........................................................................................................................ 18 MINE CLEARANCE............................................................................................................. 27 RECORDING ....................................................................................................................... 31 V1 ACQUISITION................................................................................................................. 52 QC PLANNING, HPVA and PROCESSING ........................................................................ 54 CONCLUSION ..................................................................................................................... 69

CGG Party Chief: Patrick BENAZET Client Representatives: Dennis Paul

Ian Vincent Wayne Arnold

Table of figures

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Figure 1 - Main location map.................................................................................................................. 5 Figure 2 - 3D Siwa Sallum map. .............................................................................................................. 6 Figure 3 – Siwa Sallum 3D design. .......................................................................................................... 6 Figure 4 – Siwa Sallum 3D Layout. .......................................................................................................... 7 Figure 5 – Siwa Sallum 3D descriptor. ..................................................................................................... 8 Figure 6 – View of the 3D survey. .......................................................................................................... 9 Figure 7 - Overview of the temperatures. .............................................................................................. 10 Figure 8 – Crew staff for the 3D crew. ................................................................................................... 10 Figure 9 – Operations Timing Chart. ...................................................................................................... 11 Figure 10 – View of the Labo fly camp................................................................................................... 12 Figure 11 - HSE statistics. ..................................................................................................................... 14 Figure 12 - Falcon monitoring. .............................................................................................................. 15 Figure 13 – Siwa Sallum 3D GPS Network. ............................................................................................. 19 Figure 14 – Siwa Sallum 3D GPS Range. ................................................................................................ 19 Figure 15 – Siwa Sallum 3D Benchmarks. .............................................................................................. 20 Figure 16 – Siwa Sallum GPS network points.......................................................................................... 20 Figure 17 – Surveying production for June 2007..................................................................................... 22 Figure 18 – Surveying progress map end of June. .................................................................................. 22 Figure 19 - Surveying production for July 2007. ..................................................................................... 23 Figure 20 – Surveying progress map end of July. ................................................................................... 23 Figure 21 - Surveying production for August 2007.................................................................................. 24 Figure 22 - Surveying progress map end of August. ............................................................................... 24 Figure 23 - Surveying production for September 2007. ........................................................................... 25 Figure 24 - Surveying progress map end of September........................................................................... 25 Figure 25 – Organisation of demining crews for source points................................................................. 27 Figure 26 - Organisation of demining crews for receiver points. .............................................................. 28 Figure 27 - Pilot crews sketch. .............................................................................................................. 28 Figure 28 - Military in mine clearance operation on Siwa Sallum 3D......................................................... 29 Figure 29 - Corridors Description. .......................................................................................................... 29 Figure 30 - Location of temporary bunkers............................................................................................. 30 Figure 31 – Field Digitizing Unit (FDU). Figure 32 – Line Acquisition Unit (LAUL).............................. 32 Figure 33 – LAUX. ................................................................................................................................ 32 Figure 34 – Earth Response. ................................................................................................................. 33 Figure 35 – 2D Stack test 14................................................................................................................. 34 Figure 36 – Tests planned location. ....................................................................................................... 35 Figure 37 – Vibrator pattern................................................................................................................. 37 Figure 38 – Geophone pattern. ............................................................................................................. 37 Figure 39 – Recording production in July (88946 VPs). ........................................................................... 38 Figure 40 - Recording production in August (109433 VPs)....................................................................... 38 Figure 41 - Recording Production in September (106169 VPs)................................................................. 39 Figure 42 – Layout of cables. ................................................................................................................ 40 Figure 43 – Recording 3D Progress Map. ............................................................................................... 41 Figure 44 - Noise Test. ......................................................................................................................... 43 Figure 45 - Distortion Test .................................................................................................................... 43 Figure 46 - AutoCorrelation Diagram. .................................................................................................... 45

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Figure 47 – Autocorrelation................................................................................................................... 45 Figure 48 – Amplitude and Phase Diagram............................................................................................. 46 Figure 49 – Correlograms. .................................................................................................................... 47 Figure 50 – Hardwire similarities for vibrator 20 on September 02nd. ....................................................... 48 Figure 51 - SMT Report. ....................................................................................................................... 49 Figure 52 – Working time Analysis......................................................................................................... 50 Figure 53 – Time Table of July ............................................................................................................. 50 Figure 54 - Time Table of August. ........................................................................................................ 51 Figure 55 - Time Table of September. ................................................................................................... 51 Figure 56 - V1Test location. .................................................................................................................. 52 Figure 57 – V1Test descriptor. .............................................................................................................. 52 Figure 58 - Sequence description. ......................................................................................................... 54 Figure 59 – Example of Swath pilot (Arcmap sofware). ........................................................................... 55 Figure 60– Elevation map (Arcview software)......................................................................................... 56 Figure 61 – FDU daily control. ............................................................................................................... 56 Figure 62 - Average Ground Stiffness (ArcView). .................................................................................... 57 Figure 63 - Average Ground Viscosity (ArcView). .................................................................................... 57 Figure 64 – Real final full fold map. ....................................................................................................... 58 Figure 65 – Geoland Sequence description............................................................................................. 59 Figure 66 – QC of Vibrators Position. ..................................................................................................... 60 Figure 67 – Vibrators Attributes Computation......................................................................................... 60 Figure 68 - QC of Vibrators attributes. ................................................................................................... 61 Figure 69 – Daily Report Example.......................................................................................................... 62 Figure 70 – Raw data before HPVA processing. ...................................................................................... 64 Figure 71 – Raw data “clean” after HPVA processing. ............................................................................. 64 Figure 72 – Seismic datas flow chart. .................................................................................................... 65 Figure 73 – Processing sequence........................................................................................................... 66 Figure 74 – Final Stack Swath 6. ........................................................................................................... 68 Figure 75 – Velocity Analysis................................................................................................................. 68

CGG Crew EGY3363 – FINAL REPORT – SIWA SALLUM 3D - APACHE

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PRESENTATION

GENERAL This report describes the 3D Vibroseis seismic survey carried out during the period June 2007 to September 2007 close to Marsa Matrouh area, for APACHE by the CGG ARDISEIS Crew EGY 3363 . This survey has an acquisiton surface of 1146.7 km2 and is constituted with 15 swaths, 192 receivers lines (115704 receiver points) and 171 Source lines (152904 sources points locations).

PROSPECT LOCATION The Base camp is located for Siwa Sallum 3D prospect at position 30º 12’ 03.0” of latitude North and 25º 47’ 52.9” of longitude East.

Figure 1 - Main location map.

Siwa Sallum

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Figure 2 - 3D Siwa Sallum map.

Figure 3 – Siwa Sallum 3D design.

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Figure 4 – Siwa Sallum 3D Layout.

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Figure 5 – Siwa Sallum 3D descriptor.

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NATURAL ENVIRONMENT The topography in this region is flat desert with an elevation difference upto 40 meters of the whole prospect .

Figure 6 – View of the 3D survey.

CLIMATIC CONDITIONS The weather was sunny and very windy some afternoons (especially the end of July). Fog appeared early some days during the month and delayed the time of crew’s start of work (end of August and on September). The temperature became to decrease slightly during September.

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05

10152025

3035404550

7-Jul 12-Jul 17-Jul 22-Jul 27-Jul 1-Aug 6-Aug 11-Aug 16-Aug 21-Aug 26-Aug 31-Aug 5-Sep 10-Sep 15-Sep 20-Sep 25-SepDate

tem

p º

Temp MAX Temp MIN Poly. (Temp MAX) Poly. (Temp MIN)

Figure 7 - Overview of the temperatures.

WORKFORCE STAFF ON THE SURVEY

3D Crews Staffs

0

50

100

150

200

250

300

1-Jun 16-Jun 1-Jul 16-Jul 31-Jul 15-Aug 30-Aug 14-Sep 29-Sep 14-Oct

Senior CGG

Junior CGG

Junior RIZA

Figure 8 – Crew staff for the 3D crew.

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OPERATIONS SUMMARY

OPERATIONS TIMING CHART

Figure 9 – Operations Timing Chart.

The surveying of the entire prospect took 87 days and recording 83 days.

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HPVA TECHNIQUE HPVA is inspired by the slip-sweep technique, which is essentially designed to boost crew productivity by allowing a vibrator group to sweep without waiting for the previous group’s sweep to terminate. The advantage of the HPVA technique is that it overcomes the technical limitation usually associated with slip-sweep: the recording of harmful harmonic noise, which can contaminate the data. The HPVA technique, patented by CGG, reduces the harmonic noise to an acceptable level. By estimating the harmonic content of each record, noise can be efficiently predicted and subtracted from the field data. This process is performed in the field, usually overnight, generating clean data for processing. As a result, the slip time can be reduced without degrading data quality, thereby improving crew productivity and maintaining the same signal-to-noise ratio.

CAMPS All staff were installed in the base camp established on July 06th and located in the middle of the 3D prospect until the end of the production. A fly camp was established on August 15th located in the north of the prospect and used by the recorder crews on August 26th to September 05th and from September 13th to the end of the recording operation. Communication was ensured by SSB and VHF Radios, 2 Inmarsat telephones, 5 Thuraya . 2 satellite antennas were provided by EgyptSat Company for the base and fly camps for Internet and e-mail communications. CGG Siclop e-mail system was still kept on the crew but was not used.

Figure 10 – View of the Labo fly camp.

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SAFETY Hygiene/Health: The main focus on health and hygiene was the maintenance of a high hygienic condition of the base camp. The medical department has conducted several first aid and hygiene lectures mainly involving the catering and other sections. Environment: The back crews picked up the receiver (blue) flags at the same time they picked up the geophones. Green team: The line cleaning operation (pin flags picking) started on August 15th on source points (red flags) for swaths 1 and 2 and finished at the beginning of October after the V1 test on the north prospect (swath 15). Labors adhered to environment preservation most of the time. The disposal of garbage is still a big problem in this country. Back crew picked up receiver (blue) flags at the same time they picked up the geophones. Labors adhered to the environment preservation policy.

MSV: One was done on June 16th by Alain Spinella on Riza PPEs Management. A second one done on June 17th by Muriel Cardinaux and P. Benazet. Drills: Man Lost drill was done on June 17th. Fire drill was conducted on the base camp on June 18th.. MEDEVAC drill on June 24th on survey fly camp on Siwa Sallum prospect. Fire drill done on June 28th on survey fly camp on Siwa Sallum prospect. MEDEVAC drill on July 20th. Fire drill was conducted on the base camp on July 26th. One MEDEVAC drills conducted on August 19th . A man lost drill conducted on August 31st. Fire drill was conducted on the base camp on September 18th.. Medevac drill done with Front Crews on September 25th. MEDEVAC A Medevac was done at the end of August to evacuate one RIZA driver to Matrouh after a car accident. INCIDENTS Two fire accidents occured end of August, one with the generator of the labo fly camp and the second with a truck's load The reaction of the people present for the two case were satisfactory. The bad point

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that some extinguishers, assumed to be good were not. An action point was done to improve this point (checking and remplacement of bad extinguishers). HSE Statistics:

Figure 11 - HSE statistics.

DEMINING The main hazard faced by the HSE Department during the surveying and recording operations, was keeping all the vehicles inside the de-mined corridors and tracks. This first step was based on personal behaviour in which some training was added and then monitoring. Some special measures were implemented to enforce the control of the conducted activities considered as main hazards such as road transportation, trekking, heavy maintenance. An important point for HSE on this crew is to make sure all cars are driven inside mine cleared corridors to avoid risk of accident with any UXO’s outside the corridor. This lead to the monitoring of the vehicles with the Falcon system and a graphical representation of the journeys (See example below).

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Figure 12 - Falcon monitoring.

During mine clearance operations, munitions were collected and dispatched in a temporary bunker on the prospect close to the military camp. This bunker was cleared and the munitions were destroyed outside the acquisition prospect at the end of the recording production. CAMP The demobilization of the Siwa Sallum 3D base camp finished on the 4th of October. It was organised in several small convoys, beginning from the 10st of September (survey crews). There was no incident regarding the move during this period. Decommissioning of the base camp finished on October 3th and the fly camp on October 2th. There were approved on October 3th .

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EMERGENCY RESPONSE PLAN

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HSE PROGRAMS The following table is an example of HSE program. It schedules all the meetings and trainings for a month.

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SURVEYING MAP PROJECTION : Purple Belt – Old Egyptian 3 parameters Projection Type : Transverse Mercator Central Meridian : 27º 00’ 00” East Latitude of Origin : 30º 00’ 00” North False Easting : 700 000 m False Northing : 200 000 m Scale Factor at Origin : 1 LOCAL DATUM : EGYPTIAN 1930 Name : HELMERT 1906 Semi-major axis : 6378200.00 Inverse flattening (1/f) : 298.300000 SATELLITE DATUM : WGS 84 Name : GRS 1980 Semi-major axis : 6378137.000 Inverse flattening (1/f) : 298.257223563 DATUM SHIFT (From WGS 84 to local) : 3 parameters ∆X = + 115.033 m (plus) ∆Y = - 115.760 m (minus) ∆Z = + 3.978 m (plus) VERTICAL DATUM : Mean Sea Level Units of measurements : meters Geoidal model: OSU91a Constant to MSL Adjustment: +0.70 m POINT OF ORIGIN FOR THE SATELLITE SURVEY : 2006-WK03(Western Geo.) DATUM: WGS 84 PURPLE BELT (TM) Latitude: 30º 50’ 58.9928” North Easting: 789103.056 m Longitude: 27º 55’ 59.2277” East Northing: 294548.694 m Ellipsoid Height: 152.734 m MSL Height: 133.998 m

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PERSONNEL

• 1 Expatriate • 1 Field Supervisor • 13 GPS Operators • 27 Helpers • 13 Drivers

EQUIPMENT

Field

• 3 Receivers GPS Trimble 4000 SSI 9 channels L1-L2 • 14 Receivers GPS Trimble 4700 or 5700 • 2 Trimble radios Trimmmark 2 II 25 W for Bases Repeaters; Freq 450 – 470 MHz • 3 radios Pacific Crest PDL 2W for GPS receivers; Freq 450 – 470 MHZ • 6 Magellan Meridian color • 2 Garmin GPSMap 60 CX

Office Hardware

• 2 Dell Pentium 4 Computers • 1 HP Deskjet 1280 C printer A3 format • 1 HP Laserjet 1320 printer

Software

• GPSeismic V 2006.3.00 • Grafnet Grafnav V 7.50.24.26 • Microsoft Office Pro XP • ArcView V3.2 • ArcGis ArcMap V9.1

Vehicles

• 1 Toyota Pick up • 3 Toyota Hilux • 1 Toyota SW • 8 Toyota HardTop.

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Survey Production Siwa Sallum - July 2007

0

500

1000

1500

2000

2500

1-Jul 6-Jul 11-Jul 16-Jul 21-Jul 26-Jul 31-Jul

Receivers Sources

Figure 19 - Surveying production for July 2007.

Figure 20 – Surveying progress map end of July.

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Survey Production Sallum - August 2007

0

500

1000

1500

2000

2500

3000

1-Aug 6-Aug 11-Aug 16-Aug 21-Aug 26-Aug 31-Aug

Receivers Sources

Figure 21 - Surveying production for August 2007.

Figure 22 - Surveying progress map end of August.

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. Survey operations began on June 09th from a fly camp located at the position of the Base Camp. At the end of June, 22048 receiver points (19% of the prospect) and 33025 source points (21.6% of the prospect) were surveyed. At the end of July, 35% of receivers (40548 RPs) and 37.5% of sources (57436 VPs) were surveyed the 3D prospect. At the end of August, 44652 receiver points were surveyed (38.6% of the prospect) and 57963 source points were surveyed (37.9% of the prospect). The surveying production finished on September 05th for the receiver points (8456 RPs, 7.3% surveyed in September) and finished on September 02nd for the source points (4480 VPs, 2.9% surveyed in September). The operations were managed from the Base Camp from the beginning of May. Even though the production was finished in September, activities continued for the RTK crews: - some points were resurveyed and other points offset were checked, - tracking of corridors, - control and maintenance of survey materials. As the Mine Clearance crews were not working on Friday, the surveying work was slowed down. The demining operation finished on Siwa Sallum 3D on September 11st.

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MINE CLEARANCE About 140 military worked on this area to perform the mine clearance : 12 Pilot crews for the production and detours. 12 Main crews under the supervision of 12 MIM Supervisors contracted by Apache.

Figure 25 – Organisation of demining crews for source points.

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Figure 26 - Organisation of demining crews for receiver points.

Figure 27 - Pilot crews sketch.

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Figure 28 - Military in mine clearance operation on Siwa Sallum 3D.

Figure 29 - Corridors Description.

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MUNITIONS The following munitions were discovered during the mine clearance operations:

During mine clearance operations, munitions were collected and dispatched in a temporary bunker on the prospect close to the military camp. This bunker was cleared and the munitions were destroyed outside the acquisition prospect at the end of the recording production.

Figure 30 - Location of temporary bunkers.

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RECORDING

PERSONNEL RECORDER 3 Senior observers 3 Labo Assistants 1 Junior (Trainee)

Vibrators 21 Vibrator drivers 2 Vibrator field managers 2 Vibrator mechanics 1 Service truck + 2 refuelling trucks

Labo layout

Front crews : 7 crews (120 helpers and 7 foremen). Back crews : 7 crews (57 helpers and 7 foremen).

7 Trouble shooters

Workshop

1 Labo Assistant (Workshop) 2 Foremen 8 Cable Repair 12 Workshop Helpers (RIZA Subcontracted)

EQUIPMENT 18 M27 / P23 Vibrators 1 Recording system Sercel SN408CMXL 2 SMT 200 (Geophones tester) 1 4x4 seismic recorder truck 16 4x4 Toyota 13 Iveco 4x4 Light Truck 1 Magirus 6x6 36 Sercel 408 LAUX 122 Sercel 408 LAUL 4418 Sercel 408 FDU – 100 shipped to other crew 4459 8796 Sercel SG-10 (String x12)

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Figure 36 – Tests planned location.

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Figure 37 – Vibrator pattern.

22.88 m

4.16 m

45.76 m

Figure 38 – Geophone pattern.

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Figure 42 – Layout of cables.